<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>反转世界</title>
    <style>
        #app {
            font-size: 20px;
            font-weight: bolder;
        }
    </style>
</head>

<body>
    <div id="app">
        <p>{{msg}}</p>

        <button @click="rev">逆转世界</button>
    </div>
    <script src="./vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                msg: 'Hello,World'
            },
            methods: {
                rev() {
                    this.msg = this.msg.split("").reverse().join("")
                }
            }
        })
    </script>
</body>

</html>